Kneading and mixing machine.



PATENTED MAY 2, 1905.

0. ORISTADORO.

KNBADING AND MIXING MACHINE.

APPLIGATION FILED MAR. 24, 1903.

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No. 788,822. a PATENTED MAY 2, 1905. 0. omsmnoao.

KNEADING AND MIXING MACHINE.

APPLICATION FILED MAR. 24. 1903.

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WWW/6AM, Q lwvmn/ko/m 8W M/haAM/w. 5414i w No. 788,822. PATENTED MAY 2, 1905.

O ORISTADORO V KNEADING AND MIXING MACHINE.

APPLICATION FILBD MAR. 24, 1903.

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PATENTED MAY 2, 1905.

C. GRISTADORO.

KNEADING AND MIXING MACHINE.

APPLIOATIQN IILBD MAKE 1, 1903;

4 SHBETS-SHEET 4.

latented May 2, 1905.

CHARLES CRISTADORO, OF ST. PAUL, MINNESOTA, ASSIGNOR TO WHIRL- POOL MIXER AND KNEADER COMPANY, OF ST. PAUL, MINNESOTA, A

CORPORATION OF MINNESOTA.

KNEADING AND lVIlXlNG MACE-UNE- SPEGIFIGA'IION forming part of Letters Patent No. 788,822, dated May 2, 1905.

Application filed March 24, 1903. Serial N 149,266.

To (all 111700772, it nm/y concern:

Be it known that 1, Cinemas ORIs'rADono. a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Kneading and Mixing Machines, of which the following is a specilication.

My invention relates to improvements in 1 kneading and mixing machines adapted more particularly for mixing and kneading sub stances of plastic nature or in plastic condition, such as dough, its object being to provide a machine wherein the material or ma- 1 5 terials shall be thoroughly mixed, compressed,

kneaded, shredded, and aerated.

To this end the invention consists in the construction, combination, and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1' is an end view of the machine. Fig. 2 is a side view of the same broken away at the middle. Fig. 3 is a top view. Fig. 1 is a vertical section on 2 5 line was of Fig. "3; and Fig. 5 is also a vertical section taken on line :1: w of Fig. 3, but showing the working parts in different position.

In the drawings, A represents a tilting re- 3 ceptacle or trough, rotatably supported upon a shaft 2, extending lengthwise through the trough and journaled in bearings3 in the ends of the trough and also in bearings t upon the supporting-frame B. Upon the shaft 2 is a drive-pulley 5, whereby the shaft may be driven from any suitable source of power. Interiorly the trough has a generally concaved bottom 6, formed, preferably, with longitudinal corrugations 7. Mounted nponthe 4 shaft 2 within the trough is a rotary kneading device 8, which for purposes of convenience is hereinafter designated as a roller. This kneading device is formed with one or more longitudinally-extending lobes or tongues 9 and adapted and positioned for kneading cooperation with the trouglrbottom. In order that they may have great prohensile and driving capacity, the lobes are preferably few in number and made saliently projecting, as shown in Figs. 4c and 5, so that they act like paddles in seizing the material and carrying it around. The shaft 2 extends through the trough near the concaved trough-bottom and is journaled cccentrically thereto, so that the roller is nearer the concaved trough-bottom at the rear or discharge side 11 thereof than at the forward or feed side 12, and there is an increasingly-narrowing space between the roller and the trough-bottom in the direction of rotation of the roller, as indicated by the arrow in Fig. 4 of the drawings. Arranged Within the trough near the roller is a screw conveyer13. This conveyer is mounted upon a shaft 14:, journaled in bearings 15 in the ends of the trough, and is provided with hcli- 5 coidal blades or flanges 16 for engaging the kneaded material carried around by the roller. The blades are made, preferably, in two oppositely-inclined sections, as shown in Fig. 3, so as to convey thekneaded material from the middle of the trough toward the ends or from the ends toward the middle, according to the direction of inclination of the blades. The conveyor-shaft 1a is operated from the roller-shaft 2 by means of intermeshing gears 17 and 18 upon the roller-shaft and conveyorshaft, respectively. In order that the material between or on the sides of the tongues, as well as on the outer ends thereof, may be engaged by the conveyor, the conveyer-shaft 0 14 is made with offsets 19, so that the conveyer will revolve cccentrically with reference to its own axis, and the ratio of the gears upon the roller-shaft and conveyer-shaft is made to correspond with the number of lobes or tongues of the roller, so that the conveyorblades will work in and out between the tongues, as illustrated in Figs. 1 and 5 of the drawings, and close to the sides and outer ends thereof. 0

As a convenient means for tilting the trough for the removal of the kneaded material toothed segments 20 are secured to the bottom of the trough in position to intermesh with pinions 21 upon a shaft 22, which is journaled in the ends of the frame. Upon one .end of this shaft is a worm-wheel 23, which is engaged by a worm 24 upon a shaft 25, extending transversely across one end of the frame and journaled in brackets 26 thereon. The shaft is operated by means of a hand-wheel 27 at one end thereof.

In use the materials to be mixed and kneaded are fed into the trough from above and drop into the space between the roller and the feed side 12 of the trough-bottom. They are at once seized by the lobes of the roller and are pushed, driven, and dragged over the corrugations of the trough-bottom and along the narrowing space between the trough-bottom and roller, the compression becoming greater as the space into which the material is crowded becomes narrower. In this operation the dough or other material becomes not only mixed compressed, and kneaded, butstretched, torn, shredded, and thoroughly aerated. If the materials to be treated are substantially in liquid condition when fed into the trough, such as the mixture of fiour and water to be made into dough, the mass is first splashed, churned, and tossed about by the roller and conveyer, whereby it very speedily becomes thoroughly mixed, aerated, and turned into dough, when it is seized by the lobes of the roller and carried between the roller and trough-bottom, as above described. The material is carried around by the roller until it reaches the conveyer 13. The conveyerblades, working between the tongues and close to the sides and outer ends thereof, cut, scrape, and tear the dough or other material from the roller and being made in two oppositely-in clined sections, as above stated, carry and drive it with great force in opposite directions from each end of the trough toward the middle or from the middle toward the ends, according to the direction of inclination of the blades, at which point or points it is crowded together and becomes heaped up. The material thus acted on finally drops or is carried down into the space between the roller and the feed side of the concaved bottom, when it is again seized by the lobes of the roller and subjected a sec- 0nd time to the process of kneading, mixing, pushing, and dragging above described. The material may thus be subjected to the process an indefinite number of times, the process being, indeed, continuous, so that the material may be kept in constant circulation and be continuously and successively acted upon over and over again for any desired length of time in all the variety of ways necessary for the proper amalgamation of the materials and aeration of the mass.

When the conveyer is arranged at the discharge side of the trough-bottom, as shown in the drawings, it may be desirable to prevent the material removed by the conveyer from being fed again too soon to the roller. To accomplish this, the trough may be provided with a longitudinal partition 28, extending down nearly to the place of cooperation between the conveyer and roller. The partition may be removably supported in guides 29 in the ends of the trough, as shown in the drawings.

It will be understood that the term roller as herein used is not intended to be limited to what may technically or mechanically be defined as a roller, but is intended to include any structure which will operate in substantially the same way as the kneading device herein described.

It is obvious that the details of the device may be variously modified without departing from the principle of the invention, the scope of which is defined in the claims.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the class described, the combination, with a trough, of an eccentrically-working conveyer positioned therein.

2. In a machine of the class described, the combination, with material-mixing means, of a screw conveyer arranged adjacent thereto and having eccentrically-working blades.

3. In a machine of the class described, the combination, with material-mixing means, of a screw conveyer arranged adjacent thereto, the conveyer-blades being arranged in oppositely-inclined sections whereby the material is carried in opposite directions.

4:. In a machine of the class described, the combination, with material-mixing means, of a conveyer arranged adjacent thereto, and adapted to work toward and away from the material-mixing means.

5. In a machine of the class described the combination, with material-revolving means, of a screw conveyer arranged adjacent thereto and working in cooperation therewith, the conveyer-blades being arranged in oppositelyinclined sections whereby the material is carried in opposite directions.

6. A mixing and kneading machine, comprising a trough having a generally concaved trough-bottom, a lobed kneading-roller rotatably mounted therein in position for kneading cooperation with the trough-bottom, and eccentric thereto, and a conveyer for removing material from said roller and distributing it again to the roller near its place of cooperation with the trough-bottom.

7 A mixing and kneading machine com prising a trough having a generally concaved trough-bottom, a lobed kneading-roller rotatably mounted therein in position for kneading cooperation with the trough-bottom, and a screw conveyer adjacent to the roller, the conveyer-blades being arranged in oppositelyinclined sections whereby material is removed from the roller and carried in opposite directions.

8. Amixingand kneadingmachinecomprising a trough having a generally concaved trough-bottom, a lobed kneading-roller rotatably mounted therein in position for kneading cooperation with the trough-bottom, and a screw conveyer arranged adjacent to the roller, the conveyer being adapted to work toward and away from the roller and follow the contour of its periphery, for the purpose set forth.

9. In a machine of the classdescribed the combination, with rotary material-carrying means, of a conveyer arranged adjacent thereto and adapted to work toward and away from the material-carrying means.

10. A kneading and mixing machine comprising a trough havinga corrugated bottom, a lobed kneading-roller disposed for cooperation with the trough-bottom, and a screw conveyer arranged adjacent to the roller, the conveyer being so mounted as to revolve eccentrically with. reference to its own axis wherecombination, with a kneading-roller, of a screw conveyer adjacent to the roller and Working in cooperation therewith, the conveyer-blades being arranged in oppositely-inclined sections whereby the material is carried in opposite directions.

13. In a machine of the class described the combination, with a kneading-roller, of a rotary convcyer arranged adjacent thereto and adapted to work toward and away from the roller and remove material therefrom.

14. In a machine of the class described the combination, with a kneading-roller, of a screw conveyerarranged adjacent thereto and having eccentrically-working blades adapted to engage kneaded material and remove it from the roller.

15. A machine of the class described comprising a trough, a lobed kneadiug-rollerdisposed for kneading cooperation with the trough-bottom,and a screw conveyer arranged adjacent to the roller and having eccentricallyworking blades, for the purpose described.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES GRISTADORO.

Witnesses ARTHUR l. LoTHRor, EMILY F. OTIS. 

